Abstract: By considering wind power and load as a whole,this paper proposes an energy storage peaking strategy based on day ahead and ultra-short-term rolling double time scale net load forecasting.In the planning stage,the energy storage and discharge sequence is optimized based on the previous power forecast with the minimum output of the conventional peaking unit,and the contact line power range after peak shaving is established.In the rolling adjustment optimization stage,a net load ultra-short-term forecasting method based on VMD-SaE-ELM is proposed and the next peak-adjusting reference power is dynamically adjusted based on the predicted value of the ultra-short-term net load and the power interval day ahead established to correct the energy storage and discharge power.After the peaking,the net load curve is more gradual,because the strategy has good fault tolerance for both the day ahead and ultra-short-term prediction stages.The example shows that the proposed double time scale energy storage peaking strategy can effectively reduce the fluctuation of the net load and reduce the peaking pressure of the conventional unit by using measured data.